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Int. J. Mol. Sci. 2018, 19(5), 1517;

Deleterious Effect of Advanced CKD on Glyoxalase System Activity not Limited to Diabetes Aetiology

Department of Pathophysiology, Faculty of Medicine, Masaryk University Brno, Kamenice 5, 625 00 Brno, Czech Republic
Department of Biochemistry, Faculty of Medicine, Masaryk University Brno, Kamenice 5, 625 00 Brno, Czech Republic
Department of Gastroenterology, University Hospital Brno, Jihlavská 20, 625 00 Brno, Czech Republic
Regional Centre for Applied Molecular Oncology, Masaryk Memorial Cancer Institute, Zluty kopec 7, 656 53 Brno, Czech Republic
Author to whom correspondence should be addressed.
Received: 24 April 2018 / Revised: 14 May 2018 / Accepted: 16 May 2018 / Published: 18 May 2018
(This article belongs to the Special Issue Glyoxalase System in Health and Disease 2017)
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Methylglyoxal production is increased in diabetes. Methylglyoxal is efficiently detoxified by enzyme glyoxalase 1 (GLO1). The aim was to study the effect of diabetic and CKD milieu on (a) GLO1 gene expression in peripheral blood mononuclear cells; (b) GLO1 protein levels in whole blood; and (c) GLO1 activity in RBCs in vivo in diabetic vs. non-diabetic subjects with normal or slightly reduced vs. considerably reduced renal function (CKD1-2 vs. CKD3-4). A total of 83 subjects were included in the study. Gene expression was measured using real-time PCR, and protein levels were quantified using Western blotting. Erythrocyte GLO1 activity was measured spectrophotometrically. GLO1 gene expression was significantly higher in subjects with CKD1-2 compared to CKD3-4. GLO1 protein level was lower in diabetics than in non-diabetics. GLO1 activity in RBCs differed between the four groups being significantly higher in diabetics with CKD1-2 vs. healthy subjects and vs. nondiabeticsfig with CKD3-4. GLO1 activity was significantly higher in diabetics compared to nondiabetics. In conclusion, both diabetes and CKD affects the glyoxalase system. It appears that CKD in advanced stages has prevailing and suppressive effects compared to hyperglycaemia. CKD decreases GLO1 gene expression and protein levels (together with diabetes) without concomitant changes of GLO1 activity. View Full-Text
Keywords: glyoxalase; diabetes; chronic kidney disease; diabetic nephropathy glyoxalase; diabetes; chronic kidney disease; diabetic nephropathy

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Pácal, L.; Chalásová, K.; Pleskačová, A.; Řehořová, J.; Tomandl, J.; Kaňková, K. Deleterious Effect of Advanced CKD on Glyoxalase System Activity not Limited to Diabetes Aetiology. Int. J. Mol. Sci. 2018, 19, 1517.

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